News
HFOs EVALUATED AS BLOWING AGENTS FOR EXTRUDED POLYSTYRENE (XPS) INSULATING FOAMS
03 October 2014
Various HFOs have been evaluated as replacement for HFC-134a as blowing agents for XPS (extruded polystyrene) insulating foams.
From the five different HFOs tested, HFO-1234zeE, the only one to be produced at an industrial scale, gave excellent results, when mixed with co-blowing agents in order to keep a good foam structure.
Non commercial HFO-1261zf (CH2=CH-CH2F), and HFO-1243zf (CH2=CH-CF3), in combination with co-blowing agents, gave also good results.